Apple is beginning to crack down on applications that request a user's unique advertising identifier, but that don't actually show any ads within the app, although they do track the user.
Rumors say that Apple could be promoting its own iAd network by virtue of better competitiveness ...
The performance
Most applications that display user tracking ads are registered using a unique identifier called an "identifier for advertisers" or IDFA. The operation is similar to that of a cookie, which allows advertisers to know what a specific iPhone user is looking at, and can launch an ad targeted at that specific user.
Limitation by the user
To eliminate this tracking you have to modify privacy controls They are found in the path: Settings> privacy> Advertising and here we can «Limit tracking»
According to announces the system:
iOS 7 allows you to use the advertising identifier, a temporary device identifier to better control the ability of advertisers to serve you personalized ads (selected based on your interests) in applications. If you want to limit ad tracking, apps will not be able to use the ad identifier to serve personalized ads. You can reset the advertising identifier of a device at any time. Also, iAd will prevent your Apple ID from receiving personalized ads no matter what device you use.
Note that if you turn on limiting ad tracking, you will still see the same number of ads as before, but they may be less relevant because they will not be selected based on your interests.
The problem
Some application developers are using IDFA to track users for non-advertising purposesWhile other ad networks might be counting IDFAs from non-ad serving apps, to inflate the amount they can charge their customers for apps that display ads.
Apple's restrictions
So after warning developers several times last year, Apple is starting to crack down. Here is the relevant text from Apple Developer Guides, Clause 3.31 :
You and your applications (and any third party that you have contracted for advertising) may use the Advertising Identifier, and any information obtained through the use of the Advertising Identifier, only for the purpose of serving advertising. If a user resets the Advertising Identifier, as a consequence, he agrees not to combine, correlate, link either directly or indirectly, the main Advertising Identifier with any information obtained with it, with the restoration of the Advertising Identifier.
hell
We already know that Apple has started your own iAd network. With which, advertising rates based on the number of users that an app has installed are stopped, to start charging only when a user clicks on the ad.
As a side effect, this will push ad networks to one cost per click model (CPC). Of course, Apple's own ad network, iAd, is not affected by these restrictions. You can find more information about this program at the iAd website
More information - Two months for developers to adapt in-app purchases